One Concern About Genetically Engineered Foods Is That They Could

One concern about genetically engineered foods is that they could cause allergic reactions. How could this happen?

A) If a genetically engineered food contains genes from a food that a person was allergic to, those proteins causing the reaction may be present in the engineered food.
B) An interaction of genes from two different foods combined into one might lead to new allergens being produced and everyone would be allergic since humans have not been exposed to these before.
C) If a person is allergic to one food, they're often allergic to many, and if two are combined, they're twice as likely to be affected.
D) Allergens are proteins, and new genetic combinations will result in new proteins and increased odds of an allergic reaction.
E) It's twice as likely that a food engineered from two different species will cause more of an allergic reaction than a "normal" food with just one species genes involved.